Roll call tester
US6094387A · kind A · utility
5Cited by
2References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1999 |
| Grant date | Jul 25, 2000 |
| Priority date | — |
| Expiry date | Jun 3, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C29/835
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a roll call tester, a redundancy circuit is provided which, upon predetermined normal cell addressing, activates the normal cell while rendering the redundancy cell nonactive, and, upon predetermined redundancy cell addressing, renders the normal cell nonactive while, when the roll call test signal in the test signal activation circuit is nonactive, activating the redundancy cell. This construction can realize a roll call test while eliminating the need to use a redundancy detection circuit and a signal involved in the detection thereof, and can reduce chip area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.